We need to reset the computer on a 2003 Oldsmobile Alero

Question edited for clarity and typos.
Question moved to model category.

It is a known issue. Fuel pumps can work, but not provide enough pressure, so you need to test with a pressure gauge. There is also a Pressure Regulator. Have a read of this.

https://www.justanswer.com/oldsmobile/6cz1n-oldsmobile-alero-olds-alero-starts-dies.html

Lots more here

https://www.google.com/search?q=2003+Oldsmobile+Alero+starts+and+then+dies

You may need an auto electrician with a pro grade scan tool computer.

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This may be related to the antitheft system The system is known for turning off the starter and/or injectors when it fails. Is there a light on the dash that says SECURITY? This is a common problem worth looking into.

The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.
http://www.diy-gm-security.com/

Immobilizer system possible the cause if this.. The immobilizer system is death n some vehicle it build inside the radio or meter cluster.. Try check n run diagnosis with dealer's computer

There is not set, the system has malfunctioned, see your local GM dealer.

fuel pump relay or fuse to the relay

i have the same problem with 04 turn your key until the lights on the dash come on and see of the security light is flashing if so wait about 10 min for the security system to reset as soon as the light stops flashing turn the key off then your car should start right up

How do I remove a broken motor mount on a 2003 oldsmobile alero so I can replace it with a new one

Is the security light blinking when this happens? (right hand side of the dash?) If so, it may be your passlock fuel shut off is going wacko? In the manual it tells how to reset the system. It involves leaving the key on for ten minutes until the security light stops blinking, shutting the key off, and then starting the vehicle. Check your manual. I had the 'no start' problem. I had it towed to the mechanic (with the key in the on position) and by the time I got there, it started.

Use Valvoline 10-30. Manufacturer Recomended.